Ok, belay that…a closer look shows it is black anodized aluminum with a
good deal of scratching on the outside that looks like a composite
superficially.
My apologies,
Bill
On Sun, Feb 19, 2023 at 9:13 AM William Claybaugh <wclaybaugh2@xxxxxxxxx>
wrote:
John:
I’ll shoot you privately the image that appears to be composite. It was
sent to me privately and so I am not free to post it publicly.
Bill
On Sun, Feb 19, 2023 at 8:42 AM John DeMar <jsdemar@xxxxxxxxx> wrote:
Bill,
It's aluminum:
https://www.facebook.com/photo/?fbid=10223446753893127&set=a.1045308289060
-John
On Sun, Feb 19, 2023 at 8:35 AM William Claybaugh <wclaybaugh2@xxxxxxxxx>
wrote:
John:
Based on images, it looks to me like this was a composite case.
Bill
On Sun, Feb 19, 2023 at 8:31 AM John DeMar <jsdemar@xxxxxxxxx> wrote:
Assuming a 3/8" wall 6061-T6 12" dia case and 24 3/8" hardened cap
screws, the case would tear first at about 1800 psi. If the screws were
only stainless grade, the screws would shear first at 1000 psi. Once we
know the case wall thickness, screw diameter and grade, I can re-do the
calculations.
-John DeMar
Las Cruces, NM
On Sun, Feb 19, 2023 at 3:18 AM roxanna Mason <
rocketmaster.ken@xxxxxxxxx> wrote:
One of two things:
1 - Nozzle attachment system under engineered, or
2 - Grain defect caused an over-pressure.
Did you have instrumentation, i.e. Pc trace? That will discern between
1 or 2.
Ken
On Sun, Feb 19, 2023 at 12:54 AM neutronium95 <
dmarc-noreply@xxxxxxxxxxxxx> wrote:
The 12 inch S motor blew out the nozzle on ignition. I wasn't there,
but a few different videos have been shared around.
This is the best one I've seen:
https://media.discordapp.net/attachments/355526822760415243/1076745130389815346/2023-02-18_sugar_failure_corrected.mp4
-Daniel F.
Feb 18, 2023, 8:13 PM by zeinin@xxxxxxxxx:
What happened at FAR? Facebook doesn't have anything on it
On Sat, Feb 18, 2023, 8:04 PM Matthew JL <prmattjl@xxxxxxxxx> wrote:
Heard about the CATO at FAR today - hope everyone’s OK and that the
setback proves minuscule.
Best,
-Matt L.
On Fri, Dec 16, 2022 at 8:32 PM Rick Maschek <
dmarc-noreply@xxxxxxxxxxxxx> wrote:
We are static firing our 12" S-26,500 KNSB motor tomorrow...total
impulse 355,000 Nsec.
If all goes well, it will be mated with our 10" for a 2-stage to
finally finish Sugar Shot to Space.
Rick